A changeling is Fae that has taken the place of a baby. Sometimes, it wasn't just the babies that they took the place of. Sometimes it was mothers, and we'll talk about that in a second.
Brigit i.e. a poetess, daughter of the Dagda. This is Brigit the female sage, or woman of wisdom, i.e. Brigit the goddess whom poets adored, because very great and very famous was her protecting care. It is therefore they call her goddess of poets by this name. Whose sisters were Brigit the female physician [woman of leechcraft,] Brigit the female smith [woman of smithwork]; from whose names with all Irishmen a goddess was called Brigit. Brigit, then, breo-aigit, breo-shaigit 'a fiery arrow'.
There is little information available about Abnoba, and any real information is scattered, diminished, or lost altogether. We do know that the Romans equated Her with their goddess Diana. She is thought to be a goddess of childbirth, protector of woods, waters, and wild animals.